]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - arch/x86/boot/compressed/eboot.c
projects / mirror_ubuntu-zesty-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'i2c/for-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
[mirror_ubuntu-zesty-kernel.git] / arch / x86 / boot / compressed / eboot.c
1 /* -----------------------------------------------------------------------
2 *
3 * Copyright 2011 Intel Corporation; author Matt Fleming
4 *
5 * This file is part of the Linux kernel, and is made available under
6 * the terms of the GNU General Public License version 2.
7 *
8 * ----------------------------------------------------------------------- */
9
10 #include <linux/efi.h>
11 #include <linux/pci.h>
12 #include <asm/efi.h>
13 #include <asm/setup.h>
14 #include <asm/desc.h>
15
16 #include "../string.h"
17 #include "eboot.h"
18
19 static efi_system_table_t *sys_table;
20
21 static struct efi_config *efi_early;
22
23 __pure const struct efi_config *__efi_early(void)
24 {
25 return efi_early;
26 }
27
28 #define BOOT_SERVICES(bits) \
29 static void setup_boot_services##bits(struct efi_config *c) \
30 { \
31 efi_system_table_##bits##_t *table; \
32 efi_boot_services_##bits##_t *bt; \
33 \
34 table = (typeof(table))sys_table; \
35 \
36 c->text_output = table->con_out; \
37 \
38 bt = (typeof(bt))(unsigned long)(table->boottime); \
39 \
40 c->allocate_pool = bt->allocate_pool; \
41 c->allocate_pages = bt->allocate_pages; \
42 c->get_memory_map = bt->get_memory_map; \
43 c->free_pool = bt->free_pool; \
44 c->free_pages = bt->free_pages; \
45 c->locate_handle = bt->locate_handle; \
46 c->handle_protocol = bt->handle_protocol; \
47 c->exit_boot_services = bt->exit_boot_services; \
48 }
49 BOOT_SERVICES(32);
50 BOOT_SERVICES(64);
51
52 void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
53
54 static efi_status_t
55 __file_size32(void *__fh, efi_char16_t *filename_16,
56 void **handle, u64 *file_sz)
57 {
58 efi_file_handle_32_t *h, *fh = __fh;
59 efi_file_info_t *info;
60 efi_status_t status;
61 efi_guid_t info_guid = EFI_FILE_INFO_ID;
62 u32 info_sz;
63
64 status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16,
65 EFI_FILE_MODE_READ, (u64)0);
66 if (status != EFI_SUCCESS) {
67 efi_printk(sys_table, "Failed to open file: ");
68 efi_char16_printk(sys_table, filename_16);
69 efi_printk(sys_table, "\n");
70 return status;
71 }
72
73 *handle = h;
74
75 info_sz = 0;
76 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
77 &info_sz, NULL);
78 if (status != EFI_BUFFER_TOO_SMALL) {
79 efi_printk(sys_table, "Failed to get file info size\n");
80 return status;
81 }
82
83 grow:
84 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
85 info_sz, (void **)&info);
86 if (status != EFI_SUCCESS) {
87 efi_printk(sys_table, "Failed to alloc mem for file info\n");
88 return status;
89 }
90
91 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
92 &info_sz, info);
93 if (status == EFI_BUFFER_TOO_SMALL) {
94 efi_call_early(free_pool, info);
95 goto grow;
96 }
97
98 *file_sz = info->file_size;
99 efi_call_early(free_pool, info);
100
101 if (status != EFI_SUCCESS)
102 efi_printk(sys_table, "Failed to get initrd info\n");
103
104 return status;
105 }
106
107 static efi_status_t
108 __file_size64(void *__fh, efi_char16_t *filename_16,
109 void **handle, u64 *file_sz)
110 {
111 efi_file_handle_64_t *h, *fh = __fh;
112 efi_file_info_t *info;
113 efi_status_t status;
114 efi_guid_t info_guid = EFI_FILE_INFO_ID;
115 u64 info_sz;
116
117 status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16,
118 EFI_FILE_MODE_READ, (u64)0);
119 if (status != EFI_SUCCESS) {
120 efi_printk(sys_table, "Failed to open file: ");
121 efi_char16_printk(sys_table, filename_16);
122 efi_printk(sys_table, "\n");
123 return status;
124 }
125
126 *handle = h;
127
128 info_sz = 0;
129 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
130 &info_sz, NULL);
131 if (status != EFI_BUFFER_TOO_SMALL) {
132 efi_printk(sys_table, "Failed to get file info size\n");
133 return status;
134 }
135
136 grow:
137 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
138 info_sz, (void **)&info);
139 if (status != EFI_SUCCESS) {
140 efi_printk(sys_table, "Failed to alloc mem for file info\n");
141 return status;
142 }
143
144 status = efi_early->call((unsigned long)h->get_info, h, &info_guid,
145 &info_sz, info);
146 if (status == EFI_BUFFER_TOO_SMALL) {
147 efi_call_early(free_pool, info);
148 goto grow;
149 }
150
151 *file_sz = info->file_size;
152 efi_call_early(free_pool, info);
153
154 if (status != EFI_SUCCESS)
155 efi_printk(sys_table, "Failed to get initrd info\n");
156
157 return status;
158 }
159 efi_status_t
160 efi_file_size(efi_system_table_t *sys_table, void *__fh,
161 efi_char16_t *filename_16, void **handle, u64 *file_sz)
162 {
163 if (efi_early->is64)
164 return __file_size64(__fh, filename_16, handle, file_sz);
165
166 return __file_size32(__fh, filename_16, handle, file_sz);
167 }
168
169 efi_status_t
170 efi_file_read(void *handle, unsigned long *size, void *addr)
171 {
172 unsigned long func;
173
174 if (efi_early->is64) {
175 efi_file_handle_64_t *fh = handle;
176
177 func = (unsigned long)fh->read;
178 return efi_early->call(func, handle, size, addr);
179 } else {
180 efi_file_handle_32_t *fh = handle;
181
182 func = (unsigned long)fh->read;
183 return efi_early->call(func, handle, size, addr);
184 }
185 }
186
187 efi_status_t efi_file_close(void *handle)
188 {
189 if (efi_early->is64) {
190 efi_file_handle_64_t *fh = handle;
191
192 return efi_early->call((unsigned long)fh->close, handle);
193 } else {
194 efi_file_handle_32_t *fh = handle;
195
196 return efi_early->call((unsigned long)fh->close, handle);
197 }
198 }
199
200 static inline efi_status_t __open_volume32(void *__image, void **__fh)
201 {
202 efi_file_io_interface_t *io;
203 efi_loaded_image_32_t *image = __image;
204 efi_file_handle_32_t *fh;
205 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
206 efi_status_t status;
207 void *handle = (void *)(unsigned long)image->device_handle;
208 unsigned long func;
209
210 status = efi_call_early(handle_protocol, handle,
211 &fs_proto, (void **)&io);
212 if (status != EFI_SUCCESS) {
213 efi_printk(sys_table, "Failed to handle fs_proto\n");
214 return status;
215 }
216
217 func = (unsigned long)io->open_volume;
218 status = efi_early->call(func, io, &fh);
219 if (status != EFI_SUCCESS)
220 efi_printk(sys_table, "Failed to open volume\n");
221
222 *__fh = fh;
223 return status;
224 }
225
226 static inline efi_status_t __open_volume64(void *__image, void **__fh)
227 {
228 efi_file_io_interface_t *io;
229 efi_loaded_image_64_t *image = __image;
230 efi_file_handle_64_t *fh;
231 efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
232 efi_status_t status;
233 void *handle = (void *)(unsigned long)image->device_handle;
234 unsigned long func;
235
236 status = efi_call_early(handle_protocol, handle,
237 &fs_proto, (void **)&io);
238 if (status != EFI_SUCCESS) {
239 efi_printk(sys_table, "Failed to handle fs_proto\n");
240 return status;
241 }
242
243 func = (unsigned long)io->open_volume;
244 status = efi_early->call(func, io, &fh);
245 if (status != EFI_SUCCESS)
246 efi_printk(sys_table, "Failed to open volume\n");
247
248 *__fh = fh;
249 return status;
250 }
251
252 efi_status_t
253 efi_open_volume(efi_system_table_t *sys_table, void *__image, void **__fh)
254 {
255 if (efi_early->is64)
256 return __open_volume64(__image, __fh);
257
258 return __open_volume32(__image, __fh);
259 }
260
261 void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
262 {
263 unsigned long output_string;
264 size_t offset;
265
266 if (efi_early->is64) {
267 struct efi_simple_text_output_protocol_64 *out;
268 u64 *func;
269
270 offset = offsetof(typeof(*out), output_string);
271 output_string = efi_early->text_output + offset;
272 out = (typeof(out))(unsigned long)efi_early->text_output;
273 func = (u64 *)output_string;
274
275 efi_early->call(*func, out, str);
276 } else {
277 struct efi_simple_text_output_protocol_32 *out;
278 u32 *func;
279
280 offset = offsetof(typeof(*out), output_string);
281 output_string = efi_early->text_output + offset;
282 out = (typeof(out))(unsigned long)efi_early->text_output;
283 func = (u32 *)output_string;
284
285 efi_early->call(*func, out, str);
286 }
287 }
288
289 static void find_bits(unsigned long mask, u8 *pos, u8 *size)
290 {
291 u8 first, len;
292
293 first = 0;
294 len = 0;
295
296 if (mask) {
297 while (!(mask & 0x1)) {
298 mask = mask >> 1;
299 first++;
300 }
301
302 while (mask & 0x1) {
303 mask = mask >> 1;
304 len++;
305 }
306 }
307
308 *pos = first;
309 *size = len;
310 }
311
312 static efi_status_t
313 __setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom)
314 {
315 struct pci_setup_rom *rom = NULL;
316 efi_status_t status;
317 unsigned long size;
318 uint64_t attributes;
319
320 status = efi_early->call(pci->attributes, pci,
321 EfiPciIoAttributeOperationGet, 0, 0,
322 &attributes);
323 if (status != EFI_SUCCESS)
324 return status;
325
326 if (!pci->romimage || !pci->romsize)
327 return EFI_INVALID_PARAMETER;
328
329 size = pci->romsize + sizeof(*rom);
330
331 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
332 if (status != EFI_SUCCESS) {
333 efi_printk(sys_table, "Failed to alloc mem for rom\n");
334 return status;
335 }
336
337 memset(rom, 0, sizeof(*rom));
338
339 rom->data.type = SETUP_PCI;
340 rom->data.len = size - sizeof(struct setup_data);
341 rom->data.next = 0;
342 rom->pcilen = pci->romsize;
343 *__rom = rom;
344
345 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
346 PCI_VENDOR_ID, 1, &(rom->vendor));
347
348 if (status != EFI_SUCCESS) {
349 efi_printk(sys_table, "Failed to read rom->vendor\n");
350 goto free_struct;
351 }
352
353 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
354 PCI_DEVICE_ID, 1, &(rom->devid));
355
356 if (status != EFI_SUCCESS) {
357 efi_printk(sys_table, "Failed to read rom->devid\n");
358 goto free_struct;
359 }
360
361 status = efi_early->call(pci->get_location, pci, &(rom->segment),
362 &(rom->bus), &(rom->device), &(rom->function));
363
364 if (status != EFI_SUCCESS)
365 goto free_struct;
366
367 memcpy(rom->romdata, pci->romimage, pci->romsize);
368 return status;
369
370 free_struct:
371 efi_call_early(free_pool, rom);
372 return status;
373 }
374
375 static void
376 setup_efi_pci32(struct boot_params *params, void **pci_handle,
377 unsigned long size)
378 {
379 efi_pci_io_protocol_32 *pci = NULL;
380 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
381 u32 *handles = (u32 *)(unsigned long)pci_handle;
382 efi_status_t status;
383 unsigned long nr_pci;
384 struct setup_data *data;
385 int i;
386
387 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
388
389 while (data && data->next)
390 data = (struct setup_data *)(unsigned long)data->next;
391
392 nr_pci = size / sizeof(u32);
393 for (i = 0; i < nr_pci; i++) {
394 struct pci_setup_rom *rom = NULL;
395 u32 h = handles[i];
396
397 status = efi_call_early(handle_protocol, h,
398 &pci_proto, (void **)&pci);
399
400 if (status != EFI_SUCCESS)
401 continue;
402
403 if (!pci)
404 continue;
405
406 status = __setup_efi_pci32(pci, &rom);
407 if (status != EFI_SUCCESS)
408 continue;
409
410 if (data)
411 data->next = (unsigned long)rom;
412 else
413 params->hdr.setup_data = (unsigned long)rom;
414
415 data = (struct setup_data *)rom;
416
417 }
418 }
419
420 static efi_status_t
421 __setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom)
422 {
423 struct pci_setup_rom *rom;
424 efi_status_t status;
425 unsigned long size;
426 uint64_t attributes;
427
428 status = efi_early->call(pci->attributes, pci,
429 EfiPciIoAttributeOperationGet, 0,
430 &attributes);
431 if (status != EFI_SUCCESS)
432 return status;
433
434 if (!pci->romimage || !pci->romsize)
435 return EFI_INVALID_PARAMETER;
436
437 size = pci->romsize + sizeof(*rom);
438
439 status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
440 if (status != EFI_SUCCESS) {
441 efi_printk(sys_table, "Failed to alloc mem for rom\n");
442 return status;
443 }
444
445 rom->data.type = SETUP_PCI;
446 rom->data.len = size - sizeof(struct setup_data);
447 rom->data.next = 0;
448 rom->pcilen = pci->romsize;
449 *__rom = rom;
450
451 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
452 PCI_VENDOR_ID, 1, &(rom->vendor));
453
454 if (status != EFI_SUCCESS) {
455 efi_printk(sys_table, "Failed to read rom->vendor\n");
456 goto free_struct;
457 }
458
459 status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16,
460 PCI_DEVICE_ID, 1, &(rom->devid));
461
462 if (status != EFI_SUCCESS) {
463 efi_printk(sys_table, "Failed to read rom->devid\n");
464 goto free_struct;
465 }
466
467 status = efi_early->call(pci->get_location, pci, &(rom->segment),
468 &(rom->bus), &(rom->device), &(rom->function));
469
470 if (status != EFI_SUCCESS)
471 goto free_struct;
472
473 memcpy(rom->romdata, pci->romimage, pci->romsize);
474 return status;
475
476 free_struct:
477 efi_call_early(free_pool, rom);
478 return status;
479
480 }
481
482 static void
483 setup_efi_pci64(struct boot_params *params, void **pci_handle,
484 unsigned long size)
485 {
486 efi_pci_io_protocol_64 *pci = NULL;
487 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
488 u64 *handles = (u64 *)(unsigned long)pci_handle;
489 efi_status_t status;
490 unsigned long nr_pci;
491 struct setup_data *data;
492 int i;
493
494 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
495
496 while (data && data->next)
497 data = (struct setup_data *)(unsigned long)data->next;
498
499 nr_pci = size / sizeof(u64);
500 for (i = 0; i < nr_pci; i++) {
501 struct pci_setup_rom *rom = NULL;
502 u64 h = handles[i];
503
504 status = efi_call_early(handle_protocol, h,
505 &pci_proto, (void **)&pci);
506
507 if (status != EFI_SUCCESS)
508 continue;
509
510 if (!pci)
511 continue;
512
513 status = __setup_efi_pci64(pci, &rom);
514 if (status != EFI_SUCCESS)
515 continue;
516
517 if (data)
518 data->next = (unsigned long)rom;
519 else
520 params->hdr.setup_data = (unsigned long)rom;
521
522 data = (struct setup_data *)rom;
523
524 }
525 }
526
527 /*
528 * There's no way to return an informative status from this function,
529 * because any analysis (and printing of error messages) needs to be
530 * done directly at the EFI function call-site.
531 *
532 * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we
533 * just didn't find any PCI devices, but there's no way to tell outside
534 * the context of the call.
535 */
536 static void setup_efi_pci(struct boot_params *params)
537 {
538 efi_status_t status;
539 void **pci_handle = NULL;
540 efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
541 unsigned long size = 0;
542
543 status = efi_call_early(locate_handle,
544 EFI_LOCATE_BY_PROTOCOL,
545 &pci_proto, NULL, &size, pci_handle);
546
547 if (status == EFI_BUFFER_TOO_SMALL) {
548 status = efi_call_early(allocate_pool,
549 EFI_LOADER_DATA,
550 size, (void **)&pci_handle);
551
552 if (status != EFI_SUCCESS) {
553 efi_printk(sys_table, "Failed to alloc mem for pci_handle\n");
554 return;
555 }
556
557 status = efi_call_early(locate_handle,
558 EFI_LOCATE_BY_PROTOCOL, &pci_proto,
559 NULL, &size, pci_handle);
560 }
561
562 if (status != EFI_SUCCESS)
563 goto free_handle;
564
565 if (efi_early->is64)
566 setup_efi_pci64(params, pci_handle, size);
567 else
568 setup_efi_pci32(params, pci_handle, size);
569
570 free_handle:
571 efi_call_early(free_pool, pci_handle);
572 }
573
574 static void
575 setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
576 struct efi_pixel_bitmask pixel_info, int pixel_format)
577 {
578 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
579 si->lfb_depth = 32;
580 si->lfb_linelength = pixels_per_scan_line * 4;
581 si->red_size = 8;
582 si->red_pos = 0;
583 si->green_size = 8;
584 si->green_pos = 8;
585 si->blue_size = 8;
586 si->blue_pos = 16;
587 si->rsvd_size = 8;
588 si->rsvd_pos = 24;
589 } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
590 si->lfb_depth = 32;
591 si->lfb_linelength = pixels_per_scan_line * 4;
592 si->red_size = 8;
593 si->red_pos = 16;
594 si->green_size = 8;
595 si->green_pos = 8;
596 si->blue_size = 8;
597 si->blue_pos = 0;
598 si->rsvd_size = 8;
599 si->rsvd_pos = 24;
600 } else if (pixel_format == PIXEL_BIT_MASK) {
601 find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
602 find_bits(pixel_info.green_mask, &si->green_pos,
603 &si->green_size);
604 find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
605 find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
606 &si->rsvd_size);
607 si->lfb_depth = si->red_size + si->green_size +
608 si->blue_size + si->rsvd_size;
609 si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
610 } else {
611 si->lfb_depth = 4;
612 si->lfb_linelength = si->lfb_width / 2;
613 si->red_size = 0;
614 si->red_pos = 0;
615 si->green_size = 0;
616 si->green_pos = 0;
617 si->blue_size = 0;
618 si->blue_pos = 0;
619 si->rsvd_size = 0;
620 si->rsvd_pos = 0;
621 }
622 }
623
624 static efi_status_t
625 __gop_query32(struct efi_graphics_output_protocol_32 *gop32,
626 struct efi_graphics_output_mode_info **info,
627 unsigned long *size, u32 *fb_base)
628 {
629 struct efi_graphics_output_protocol_mode_32 *mode;
630 efi_status_t status;
631 unsigned long m;
632
633 m = gop32->mode;
634 mode = (struct efi_graphics_output_protocol_mode_32 *)m;
635
636 status = efi_early->call(gop32->query_mode, gop32,
637 mode->mode, size, info);
638 if (status != EFI_SUCCESS)
639 return status;
640
641 *fb_base = mode->frame_buffer_base;
642 return status;
643 }
644
645 static efi_status_t
646 setup_gop32(struct screen_info *si, efi_guid_t *proto,
647 unsigned long size, void **gop_handle)
648 {
649 struct efi_graphics_output_protocol_32 *gop32, *first_gop;
650 unsigned long nr_gops;
651 u16 width, height;
652 u32 pixels_per_scan_line;
653 u32 fb_base;
654 struct efi_pixel_bitmask pixel_info;
655 int pixel_format;
656 efi_status_t status;
657 u32 *handles = (u32 *)(unsigned long)gop_handle;
658 int i;
659
660 first_gop = NULL;
661 gop32 = NULL;
662
663 nr_gops = size / sizeof(u32);
664 for (i = 0; i < nr_gops; i++) {
665 struct efi_graphics_output_mode_info *info = NULL;
666 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
667 bool conout_found = false;
668 void *dummy = NULL;
669 u32 h = handles[i];
670
671 status = efi_call_early(handle_protocol, h,
672 proto, (void **)&gop32);
673 if (status != EFI_SUCCESS)
674 continue;
675
676 status = efi_call_early(handle_protocol, h,
677 &conout_proto, &dummy);
678 if (status == EFI_SUCCESS)
679 conout_found = true;
680
681 status = __gop_query32(gop32, &info, &size, &fb_base);
682 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
683 /*
684 * Systems that use the UEFI Console Splitter may
685 * provide multiple GOP devices, not all of which are
686 * backed by real hardware. The workaround is to search
687 * for a GOP implementing the ConOut protocol, and if
688 * one isn't found, to just fall back to the first GOP.
689 */
690 width = info->horizontal_resolution;
691 height = info->vertical_resolution;
692 pixel_format = info->pixel_format;
693 pixel_info = info->pixel_information;
694 pixels_per_scan_line = info->pixels_per_scan_line;
695
696 /*
697 * Once we've found a GOP supporting ConOut,
698 * don't bother looking any further.
699 */
700 first_gop = gop32;
701 if (conout_found)
702 break;
703 }
704 }
705
706 /* Did we find any GOPs? */
707 if (!first_gop)
708 goto out;
709
710 /* EFI framebuffer */
711 si->orig_video_isVGA = VIDEO_TYPE_EFI;
712
713 si->lfb_width = width;
714 si->lfb_height = height;
715 si->lfb_base = fb_base;
716 si->pages = 1;
717
718 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
719
720 si->lfb_size = si->lfb_linelength * si->lfb_height;
721
722 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
723 out:
724 return status;
725 }
726
727 static efi_status_t
728 __gop_query64(struct efi_graphics_output_protocol_64 *gop64,
729 struct efi_graphics_output_mode_info **info,
730 unsigned long *size, u32 *fb_base)
731 {
732 struct efi_graphics_output_protocol_mode_64 *mode;
733 efi_status_t status;
734 unsigned long m;
735
736 m = gop64->mode;
737 mode = (struct efi_graphics_output_protocol_mode_64 *)m;
738
739 status = efi_early->call(gop64->query_mode, gop64,
740 mode->mode, size, info);
741 if (status != EFI_SUCCESS)
742 return status;
743
744 *fb_base = mode->frame_buffer_base;
745 return status;
746 }
747
748 static efi_status_t
749 setup_gop64(struct screen_info *si, efi_guid_t *proto,
750 unsigned long size, void **gop_handle)
751 {
752 struct efi_graphics_output_protocol_64 *gop64, *first_gop;
753 unsigned long nr_gops;
754 u16 width, height;
755 u32 pixels_per_scan_line;
756 u32 fb_base;
757 struct efi_pixel_bitmask pixel_info;
758 int pixel_format;
759 efi_status_t status;
760 u64 *handles = (u64 *)(unsigned long)gop_handle;
761 int i;
762
763 first_gop = NULL;
764 gop64 = NULL;
765
766 nr_gops = size / sizeof(u64);
767 for (i = 0; i < nr_gops; i++) {
768 struct efi_graphics_output_mode_info *info = NULL;
769 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
770 bool conout_found = false;
771 void *dummy = NULL;
772 u64 h = handles[i];
773
774 status = efi_call_early(handle_protocol, h,
775 proto, (void **)&gop64);
776 if (status != EFI_SUCCESS)
777 continue;
778
779 status = efi_call_early(handle_protocol, h,
780 &conout_proto, &dummy);
781 if (status == EFI_SUCCESS)
782 conout_found = true;
783
784 status = __gop_query64(gop64, &info, &size, &fb_base);
785 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
786 /*
787 * Systems that use the UEFI Console Splitter may
788 * provide multiple GOP devices, not all of which are
789 * backed by real hardware. The workaround is to search
790 * for a GOP implementing the ConOut protocol, and if
791 * one isn't found, to just fall back to the first GOP.
792 */
793 width = info->horizontal_resolution;
794 height = info->vertical_resolution;
795 pixel_format = info->pixel_format;
796 pixel_info = info->pixel_information;
797 pixels_per_scan_line = info->pixels_per_scan_line;
798
799 /*
800 * Once we've found a GOP supporting ConOut,
801 * don't bother looking any further.
802 */
803 first_gop = gop64;
804 if (conout_found)
805 break;
806 }
807 }
808
809 /* Did we find any GOPs? */
810 if (!first_gop)
811 goto out;
812
813 /* EFI framebuffer */
814 si->orig_video_isVGA = VIDEO_TYPE_EFI;
815
816 si->lfb_width = width;
817 si->lfb_height = height;
818 si->lfb_base = fb_base;
819 si->pages = 1;
820
821 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
822
823 si->lfb_size = si->lfb_linelength * si->lfb_height;
824
825 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
826 out:
827 return status;
828 }
829
830 /*
831 * See if we have Graphics Output Protocol
832 */
833 static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
834 unsigned long size)
835 {
836 efi_status_t status;
837 void **gop_handle = NULL;
838
839 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
840 size, (void **)&gop_handle);
841 if (status != EFI_SUCCESS)
842 return status;
843
844 status = efi_call_early(locate_handle,
845 EFI_LOCATE_BY_PROTOCOL,
846 proto, NULL, &size, gop_handle);
847 if (status != EFI_SUCCESS)
848 goto free_handle;
849
850 if (efi_early->is64)
851 status = setup_gop64(si, proto, size, gop_handle);
852 else
853 status = setup_gop32(si, proto, size, gop_handle);
854
855 free_handle:
856 efi_call_early(free_pool, gop_handle);
857 return status;
858 }
859
860 static efi_status_t
861 setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
862 {
863 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
864 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
865 unsigned long nr_ugas;
866 u32 *handles = (u32 *)uga_handle;;
867 efi_status_t status;
868 int i;
869
870 first_uga = NULL;
871 nr_ugas = size / sizeof(u32);
872 for (i = 0; i < nr_ugas; i++) {
873 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
874 u32 w, h, depth, refresh;
875 void *pciio;
876 u32 handle = handles[i];
877
878 status = efi_call_early(handle_protocol, handle,
879 &uga_proto, (void **)&uga);
880 if (status != EFI_SUCCESS)
881 continue;
882
883 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
884
885 status = efi_early->call((unsigned long)uga->get_mode, uga,
886 &w, &h, &depth, &refresh);
887 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
888 *width = w;
889 *height = h;
890
891 /*
892 * Once we've found a UGA supporting PCIIO,
893 * don't bother looking any further.
894 */
895 if (pciio)
896 break;
897
898 first_uga = uga;
899 }
900 }
901
902 return status;
903 }
904
905 static efi_status_t
906 setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height)
907 {
908 struct efi_uga_draw_protocol *uga = NULL, *first_uga;
909 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
910 unsigned long nr_ugas;
911 u64 *handles = (u64 *)uga_handle;;
912 efi_status_t status;
913 int i;
914
915 first_uga = NULL;
916 nr_ugas = size / sizeof(u64);
917 for (i = 0; i < nr_ugas; i++) {
918 efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
919 u32 w, h, depth, refresh;
920 void *pciio;
921 u64 handle = handles[i];
922
923 status = efi_call_early(handle_protocol, handle,
924 &uga_proto, (void **)&uga);
925 if (status != EFI_SUCCESS)
926 continue;
927
928 efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
929
930 status = efi_early->call((unsigned long)uga->get_mode, uga,
931 &w, &h, &depth, &refresh);
932 if (status == EFI_SUCCESS && (!first_uga || pciio)) {
933 *width = w;
934 *height = h;
935
936 /*
937 * Once we've found a UGA supporting PCIIO,
938 * don't bother looking any further.
939 */
940 if (pciio)
941 break;
942
943 first_uga = uga;
944 }
945 }
946
947 return status;
948 }
949
950 /*
951 * See if we have Universal Graphics Adapter (UGA) protocol
952 */
953 static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto,
954 unsigned long size)
955 {
956 efi_status_t status;
957 u32 width, height;
958 void **uga_handle = NULL;
959
960 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
961 size, (void **)&uga_handle);
962 if (status != EFI_SUCCESS)
963 return status;
964
965 status = efi_call_early(locate_handle,
966 EFI_LOCATE_BY_PROTOCOL,
967 uga_proto, NULL, &size, uga_handle);
968 if (status != EFI_SUCCESS)
969 goto free_handle;
970
971 height = 0;
972 width = 0;
973
974 if (efi_early->is64)
975 status = setup_uga64(uga_handle, size, &width, &height);
976 else
977 status = setup_uga32(uga_handle, size, &width, &height);
978
979 if (!width && !height)
980 goto free_handle;
981
982 /* EFI framebuffer */
983 si->orig_video_isVGA = VIDEO_TYPE_EFI;
984
985 si->lfb_depth = 32;
986 si->lfb_width = width;
987 si->lfb_height = height;
988
989 si->red_size = 8;
990 si->red_pos = 16;
991 si->green_size = 8;
992 si->green_pos = 8;
993 si->blue_size = 8;
994 si->blue_pos = 0;
995 si->rsvd_size = 8;
996 si->rsvd_pos = 24;
997
998 free_handle:
999 efi_call_early(free_pool, uga_handle);
1000 return status;
1001 }
1002
1003 void setup_graphics(struct boot_params *boot_params)
1004 {
1005 efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
1006 struct screen_info *si;
1007 efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
1008 efi_status_t status;
1009 unsigned long size;
1010 void **gop_handle = NULL;
1011 void **uga_handle = NULL;
1012
1013 si = &boot_params->screen_info;
1014 memset(si, 0, sizeof(*si));
1015
1016 size = 0;
1017 status = efi_call_early(locate_handle,
1018 EFI_LOCATE_BY_PROTOCOL,
1019 &graphics_proto, NULL, &size, gop_handle);
1020 if (status == EFI_BUFFER_TOO_SMALL)
1021 status = setup_gop(si, &graphics_proto, size);
1022
1023 if (status != EFI_SUCCESS) {
1024 size = 0;
1025 status = efi_call_early(locate_handle,
1026 EFI_LOCATE_BY_PROTOCOL,
1027 &uga_proto, NULL, &size, uga_handle);
1028 if (status == EFI_BUFFER_TOO_SMALL)
1029 setup_uga(si, &uga_proto, size);
1030 }
1031 }
1032
1033 /*
1034 * Because the x86 boot code expects to be passed a boot_params we
1035 * need to create one ourselves (usually the bootloader would create
1036 * one for us).
1037 *
1038 * The caller is responsible for filling out ->code32_start in the
1039 * returned boot_params.
1040 */
1041 struct boot_params *make_boot_params(struct efi_config *c)
1042 {
1043 struct boot_params *boot_params;
1044 struct sys_desc_table *sdt;
1045 struct apm_bios_info *bi;
1046 struct setup_header *hdr;
1047 struct efi_info *efi;
1048 efi_loaded_image_t *image;
1049 void *options, *handle;
1050 efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
1051 int options_size = 0;
1052 efi_status_t status;
1053 char *cmdline_ptr;
1054 u16 *s2;
1055 u8 *s1;
1056 int i;
1057 unsigned long ramdisk_addr;
1058 unsigned long ramdisk_size;
1059
1060 efi_early = c;
1061 sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
1062 handle = (void *)(unsigned long)efi_early->image_handle;
1063
1064 /* Check if we were booted by the EFI firmware */
1065 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1066 return NULL;
1067
1068 if (efi_early->is64)
1069 setup_boot_services64(efi_early);
1070 else
1071 setup_boot_services32(efi_early);
1072
1073 status = efi_call_early(handle_protocol, handle,
1074 &proto, (void *)&image);
1075 if (status != EFI_SUCCESS) {
1076 efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
1077 return NULL;
1078 }
1079
1080 status = efi_low_alloc(sys_table, 0x4000, 1,
1081 (unsigned long *)&boot_params);
1082 if (status != EFI_SUCCESS) {
1083 efi_printk(sys_table, "Failed to alloc lowmem for boot params\n");
1084 return NULL;
1085 }
1086
1087 memset(boot_params, 0x0, 0x4000);
1088
1089 hdr = &boot_params->hdr;
1090 efi = &boot_params->efi_info;
1091 bi = &boot_params->apm_bios_info;
1092 sdt = &boot_params->sys_desc_table;
1093
1094 /* Copy the second sector to boot_params */
1095 memcpy(&hdr->jump, image->image_base + 512, 512);
1096
1097 /*
1098 * Fill out some of the header fields ourselves because the
1099 * EFI firmware loader doesn't load the first sector.
1100 */
1101 hdr->root_flags = 1;
1102 hdr->vid_mode = 0xffff;
1103 hdr->boot_flag = 0xAA55;
1104
1105 hdr->type_of_loader = 0x21;
1106
1107 /* Convert unicode cmdline to ascii */
1108 cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size);
1109 if (!cmdline_ptr)
1110 goto fail;
1111 hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
1112
1113 hdr->ramdisk_image = 0;
1114 hdr->ramdisk_size = 0;
1115
1116 /* Clear APM BIOS info */
1117 memset(bi, 0, sizeof(*bi));
1118
1119 memset(sdt, 0, sizeof(*sdt));
1120
1121 status = efi_parse_options(cmdline_ptr);
1122 if (status != EFI_SUCCESS)
1123 goto fail2;
1124
1125 status = handle_cmdline_files(sys_table, image,
1126 (char *)(unsigned long)hdr->cmd_line_ptr,
1127 "initrd=", hdr->initrd_addr_max,
1128 &ramdisk_addr, &ramdisk_size);
1129
1130 if (status != EFI_SUCCESS &&
1131 hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) {
1132 efi_printk(sys_table, "Trying to load files to higher address\n");
1133 status = handle_cmdline_files(sys_table, image,
1134 (char *)(unsigned long)hdr->cmd_line_ptr,
1135 "initrd=", -1UL,
1136 &ramdisk_addr, &ramdisk_size);
1137 }
1138
1139 if (status != EFI_SUCCESS)
1140 goto fail2;
1141 hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
1142 hdr->ramdisk_size = ramdisk_size & 0xffffffff;
1143 boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
1144 boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
1145
1146 return boot_params;
1147 fail2:
1148 efi_free(sys_table, options_size, hdr->cmd_line_ptr);
1149 fail:
1150 efi_free(sys_table, 0x4000, (unsigned long)boot_params);
1151 return NULL;
1152 }
1153
1154 static void add_e820ext(struct boot_params *params,
1155 struct setup_data *e820ext, u32 nr_entries)
1156 {
1157 struct setup_data *data;
1158 efi_status_t status;
1159 unsigned long size;
1160
1161 e820ext->type = SETUP_E820_EXT;
1162 e820ext->len = nr_entries * sizeof(struct e820entry);
1163 e820ext->next = 0;
1164
1165 data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
1166
1167 while (data && data->next)
1168 data = (struct setup_data *)(unsigned long)data->next;
1169
1170 if (data)
1171 data->next = (unsigned long)e820ext;
1172 else
1173 params->hdr.setup_data = (unsigned long)e820ext;
1174 }
1175
1176 static efi_status_t setup_e820(struct boot_params *params,
1177 struct setup_data *e820ext, u32 e820ext_size)
1178 {
1179 struct e820entry *e820_map = &params->e820_map[0];
1180 struct efi_info *efi = &params->efi_info;
1181 struct e820entry *prev = NULL;
1182 u32 nr_entries;
1183 u32 nr_desc;
1184 int i;
1185
1186 nr_entries = 0;
1187 nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
1188
1189 for (i = 0; i < nr_desc; i++) {
1190 efi_memory_desc_t *d;
1191 unsigned int e820_type = 0;
1192 unsigned long m = efi->efi_memmap;
1193
1194 d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
1195 switch (d->type) {
1196 case EFI_RESERVED_TYPE:
1197 case EFI_RUNTIME_SERVICES_CODE:
1198 case EFI_RUNTIME_SERVICES_DATA:
1199 case EFI_MEMORY_MAPPED_IO:
1200 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
1201 case EFI_PAL_CODE:
1202 e820_type = E820_RESERVED;
1203 break;
1204
1205 case EFI_UNUSABLE_MEMORY:
1206 e820_type = E820_UNUSABLE;
1207 break;
1208
1209 case EFI_ACPI_RECLAIM_MEMORY:
1210 e820_type = E820_ACPI;
1211 break;
1212
1213 case EFI_LOADER_CODE:
1214 case EFI_LOADER_DATA:
1215 case EFI_BOOT_SERVICES_CODE:
1216 case EFI_BOOT_SERVICES_DATA:
1217 case EFI_CONVENTIONAL_MEMORY:
1218 e820_type = E820_RAM;
1219 break;
1220
1221 case EFI_ACPI_MEMORY_NVS:
1222 e820_type = E820_NVS;
1223 break;
1224
1225 default:
1226 continue;
1227 }
1228
1229 /* Merge adjacent mappings */
1230 if (prev && prev->type == e820_type &&
1231 (prev->addr + prev->size) == d->phys_addr) {
1232 prev->size += d->num_pages << 12;
1233 continue;
1234 }
1235
1236 if (nr_entries == ARRAY_SIZE(params->e820_map)) {
1237 u32 need = (nr_desc - i) * sizeof(struct e820entry) +
1238 sizeof(struct setup_data);
1239
1240 if (!e820ext || e820ext_size < need)
1241 return EFI_BUFFER_TOO_SMALL;
1242
1243 /* boot_params map full, switch to e820 extended */
1244 e820_map = (struct e820entry *)e820ext->data;
1245 }
1246
1247 e820_map->addr = d->phys_addr;
1248 e820_map->size = d->num_pages << PAGE_SHIFT;
1249 e820_map->type = e820_type;
1250 prev = e820_map++;
1251 nr_entries++;
1252 }
1253
1254 if (nr_entries > ARRAY_SIZE(params->e820_map)) {
1255 u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_map);
1256
1257 add_e820ext(params, e820ext, nr_e820ext);
1258 nr_entries -= nr_e820ext;
1259 }
1260
1261 params->e820_entries = (u8)nr_entries;
1262
1263 return EFI_SUCCESS;
1264 }
1265
1266 static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
1267 u32 *e820ext_size)
1268 {
1269 efi_status_t status;
1270 unsigned long size;
1271
1272 size = sizeof(struct setup_data) +
1273 sizeof(struct e820entry) * nr_desc;
1274
1275 if (*e820ext) {
1276 efi_call_early(free_pool, *e820ext);
1277 *e820ext = NULL;
1278 *e820ext_size = 0;
1279 }
1280
1281 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1282 size, (void **)e820ext);
1283 if (status == EFI_SUCCESS)
1284 *e820ext_size = size;
1285
1286 return status;
1287 }
1288
1289 static efi_status_t exit_boot(struct boot_params *boot_params,
1290 void *handle, bool is64)
1291 {
1292 struct efi_info *efi = &boot_params->efi_info;
1293 unsigned long map_sz, key, desc_size;
1294 efi_memory_desc_t *mem_map;
1295 struct setup_data *e820ext;
1296 const char *signature;
1297 __u32 e820ext_size;
1298 __u32 nr_desc, prev_nr_desc;
1299 efi_status_t status;
1300 __u32 desc_version;
1301 bool called_exit = false;
1302 u8 nr_entries;
1303 int i;
1304
1305 nr_desc = 0;
1306 e820ext = NULL;
1307 e820ext_size = 0;
1308
1309 get_map:
1310 status = efi_get_memory_map(sys_table, &mem_map, &map_sz, &desc_size,
1311 &desc_version, &key);
1312
1313 if (status != EFI_SUCCESS)
1314 return status;
1315
1316 prev_nr_desc = nr_desc;
1317 nr_desc = map_sz / desc_size;
1318 if (nr_desc > prev_nr_desc &&
1319 nr_desc > ARRAY_SIZE(boot_params->e820_map)) {
1320 u32 nr_e820ext = nr_desc - ARRAY_SIZE(boot_params->e820_map);
1321
1322 status = alloc_e820ext(nr_e820ext, &e820ext, &e820ext_size);
1323 if (status != EFI_SUCCESS)
1324 goto free_mem_map;
1325
1326 efi_call_early(free_pool, mem_map);
1327 goto get_map; /* Allocated memory, get map again */
1328 }
1329
1330 signature = is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
1331 memcpy(&efi->efi_loader_signature, signature, sizeof(__u32));
1332
1333 efi->efi_systab = (unsigned long)sys_table;
1334 efi->efi_memdesc_size = desc_size;
1335 efi->efi_memdesc_version = desc_version;
1336 efi->efi_memmap = (unsigned long)mem_map;
1337 efi->efi_memmap_size = map_sz;
1338
1339 #ifdef CONFIG_X86_64
1340 efi->efi_systab_hi = (unsigned long)sys_table >> 32;
1341 efi->efi_memmap_hi = (unsigned long)mem_map >> 32;
1342 #endif
1343
1344 /* Might as well exit boot services now */
1345 status = efi_call_early(exit_boot_services, handle, key);
1346 if (status != EFI_SUCCESS) {
1347 /*
1348 * ExitBootServices() will fail if any of the event
1349 * handlers change the memory map. In which case, we
1350 * must be prepared to retry, but only once so that
1351 * we're guaranteed to exit on repeated failures instead
1352 * of spinning forever.
1353 */
1354 if (called_exit)
1355 goto free_mem_map;
1356
1357 called_exit = true;
1358 efi_call_early(free_pool, mem_map);
1359 goto get_map;
1360 }
1361
1362 /* Historic? */
1363 boot_params->alt_mem_k = 32 * 1024;
1364
1365 status = setup_e820(boot_params, e820ext, e820ext_size);
1366 if (status != EFI_SUCCESS)
1367 return status;
1368
1369 return EFI_SUCCESS;
1370
1371 free_mem_map:
1372 efi_call_early(free_pool, mem_map);
1373 return status;
1374 }
1375
1376 /*
1377 * On success we return a pointer to a boot_params structure, and NULL
1378 * on failure.
1379 */
1380 struct boot_params *efi_main(struct efi_config *c,
1381 struct boot_params *boot_params)
1382 {
1383 struct desc_ptr *gdt = NULL;
1384 efi_loaded_image_t *image;
1385 struct setup_header *hdr = &boot_params->hdr;
1386 efi_status_t status;
1387 struct desc_struct *desc;
1388 void *handle;
1389 efi_system_table_t *_table;
1390 bool is64;
1391
1392 efi_early = c;
1393
1394 _table = (efi_system_table_t *)(unsigned long)efi_early->table;
1395 handle = (void *)(unsigned long)efi_early->image_handle;
1396 is64 = efi_early->is64;
1397
1398 sys_table = _table;
1399
1400 /* Check if we were booted by the EFI firmware */
1401 if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
1402 goto fail;
1403
1404 if (is64)
1405 setup_boot_services64(efi_early);
1406 else
1407 setup_boot_services32(efi_early);
1408
1409 setup_graphics(boot_params);
1410
1411 setup_efi_pci(boot_params);
1412
1413 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
1414 sizeof(*gdt), (void **)&gdt);
1415 if (status != EFI_SUCCESS) {
1416 efi_printk(sys_table, "Failed to alloc mem for gdt structure\n");
1417 goto fail;
1418 }
1419
1420 gdt->size = 0x800;
1421 status = efi_low_alloc(sys_table, gdt->size, 8,
1422 (unsigned long *)&gdt->address);
1423 if (status != EFI_SUCCESS) {
1424 efi_printk(sys_table, "Failed to alloc mem for gdt\n");
1425 goto fail;
1426 }
1427
1428 /*
1429 * If the kernel isn't already loaded at the preferred load
1430 * address, relocate it.
1431 */
1432 if (hdr->pref_address != hdr->code32_start) {
1433 unsigned long bzimage_addr = hdr->code32_start;
1434 status = efi_relocate_kernel(sys_table, &bzimage_addr,
1435 hdr->init_size, hdr->init_size,
1436 hdr->pref_address,
1437 hdr->kernel_alignment);
1438 if (status != EFI_SUCCESS) {
1439 efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
1440 goto fail;
1441 }
1442
1443 hdr->pref_address = hdr->code32_start;
1444 hdr->code32_start = bzimage_addr;
1445 }
1446
1447 status = exit_boot(boot_params, handle, is64);
1448 if (status != EFI_SUCCESS) {
1449 efi_printk(sys_table, "exit_boot() failed!\n");
1450 goto fail;
1451 }
1452
1453 memset((char *)gdt->address, 0x0, gdt->size);
1454 desc = (struct desc_struct *)gdt->address;
1455
1456 /* The first GDT is a dummy and the second is unused. */
1457 desc += 2;
1458
1459 desc->limit0 = 0xffff;
1460 desc->base0 = 0x0000;
1461 desc->base1 = 0x0000;
1462 desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
1463 desc->s = DESC_TYPE_CODE_DATA;
1464 desc->dpl = 0;
1465 desc->p = 1;
1466 desc->limit = 0xf;
1467 desc->avl = 0;
1468 desc->l = 0;
1469 desc->d = SEG_OP_SIZE_32BIT;
1470 desc->g = SEG_GRANULARITY_4KB;
1471 desc->base2 = 0x00;
1472
1473 desc++;
1474 desc->limit0 = 0xffff;
1475 desc->base0 = 0x0000;
1476 desc->base1 = 0x0000;
1477 desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
1478 desc->s = DESC_TYPE_CODE_DATA;
1479 desc->dpl = 0;
1480 desc->p = 1;
1481 desc->limit = 0xf;
1482 desc->avl = 0;
1483 desc->l = 0;
1484 desc->d = SEG_OP_SIZE_32BIT;
1485 desc->g = SEG_GRANULARITY_4KB;
1486 desc->base2 = 0x00;
1487
1488 #ifdef CONFIG_X86_64
1489 /* Task segment value */
1490 desc++;
1491 desc->limit0 = 0x0000;
1492 desc->base0 = 0x0000;
1493 desc->base1 = 0x0000;
1494 desc->type = SEG_TYPE_TSS;
1495 desc->s = 0;
1496 desc->dpl = 0;
1497 desc->p = 1;
1498 desc->limit = 0x0;
1499 desc->avl = 0;
1500 desc->l = 0;
1501 desc->d = 0;
1502 desc->g = SEG_GRANULARITY_4KB;
1503 desc->base2 = 0x00;
1504 #endif /* CONFIG_X86_64 */
1505
1506 asm volatile("cli");
1507 asm volatile ("lgdt %0" : : "m" (*gdt));
1508
1509 return boot_params;
1510 fail:
1511 efi_printk(sys_table, "efi_main() failed!\n");
1512 return NULL;
1513 }
ubuntu-zesty-kernel mirror